When to apply for JSA?

Hi

I was made redundant on Friday and I am not working my notice period.

I'm not sure whether to apply for JSA tomorrow or do i wait until i have received my final payment from work which would be 26th May, or do i need to wait until 4 weeks has elapsed since Friday? I have ASU insurance as well which i need to make a claim on and that says I must make a claim within 30 days of being made redundant, again i don't know when my "final" date is.

Any advice is appreciated.